Apparatus for jointing lead or like pipes or sheaths



March 18, 1930. A. E. WILSON 1,751,019

APPARATUS FOR JOINTING LEAD OR LIKE PIPES OR SHEATHS Filed sept. 1o, 1927 Patented Mar. 18, 193() e Maria l Filz ALFRED EDGAR WILSON, OF BROMLEY, ENGLAND` APPARATUS FOR JOINTING LEAD OR LIKE kPIPES OR SHEATIl-IS Application led September 10, 1927, Serial No.

This invention relates to apparatus for jointing lead or like pipes or sheaths and more particularly to apparatus for making such joints by the application of heat and pressure applied to a sleeve either made of readily fusible metal or lined therewith and placed round the joint.l Joints of this general type are known in themselves and electrically heated clamps are sometimes used for making them. j

Whilst electrically heated apparatus is most suitable for use in certain circumstances, it is sometimes inconvenient to employ'it, and the present invention has for its object the provision of means whereby joints of the kind referred to can'be made readily by the heat from a blow-lamp or like flame.

In making joints according to this invention a clamp is employed having one or more members serving to conduct the heat from a blow-lamp or like flame to the parts immediately'adjacent to the joint and to Vshield the neighbouring portions of the pipe or sheath. l

In one construction the clamp is provided with a projection or iin of metal so shaped that a blow-lamp flame can be readily applied to kit without risk of heating unduly the neighbouring portions of the pipe or sheath. The clamp is divided longitudinally into two or more parts so that it can be placed round the sleeve or gland over the joint and the f iin or projection may, when the clamp is in position, be conical or funnel-shaped and extend round the pipe at inappropriate angle thereto.

Conveniently a definite shield is provided to protect the portion of the pipe or sheath within this conical fin and'such shield may 40 be in the form of a tubular extension of the clamp of sufficient diameter to be separated from the pipe or sheath which it surrounds by an air space. This annular shield may be partly or wholly formed of, or may be covered by, asbestos or other heat insulating substance.

In some constructions the projectiony or iin may form one side or wall of an annular chamber surrounding the clamp and acting .to conserve the heat around the portion of 218,728, and in Great Britain October 23, 192K` the clamp immediately adjacent to the joint. This chamber may be closed by ra surrounding wall of asbestosi In another construction, also according to this invention, the member to which the heat-v ing'flame is applied is in the form of a tubular chamber contained within the clamp and having a funnel-shaped mouth projecting from the side of the clamp.- Into this chamber the flame is directed and the mouth is preferably lined or covered with asbestos to lact as a shield. This tubular chamber may be lined with lire-clay or other refractory' prevent deteriorationk of the material to metal. Y j s The clamp may be provided with any desired number of lthese tubular chambers but when the clamp is in two parts each part preferably, has one such chamber.

The chamber may be gr the'clamp, i. e. may consist of a bore or cavity in it or may be a separate tube clamped or otherwise held in a hole or recess in the clamp.

formed inteoral with An advantage of such aseparate tube is that hasthe desired effect which is the proper'- amalgamation of the fusible lining of the sleeve with the exterior of the pipe so that a solid joint capable of withstariding considerable internal pressure is made. Such effect would not be obtained with certainty byallowing a blow-lamp. flame to be directed onto a clamp not provided with a definite heating member. i v

Pressure/may beY applied to the heated clamp'in any convenient'way, for instance by screws or bolts tending toforce the two parts, lofthe clamp onto the inner sleeve, or again the exterior face of the sleeve may be .conical 'Y Y nutsan'd bolts.

ing elements one on eachfside of` the clamp,

6o l and the heating flame is applied yto the heads v,

' andthe interior faces of the clamp similarly shaped so that the pressure may be kapplied by bolts or studs tending to move the clamp i Y longitudinally over the sleeve.y Such acon- 5' structionris convenient for making joints be-4 Atween the glands "and the lead sheathing of y electric cables, r l y In the accunpanyingdrawings?-y Figures l and'Qare part sectional elevai i0 tions of tvvo` simpleY forms of clamps accordi ing tothis invention;VV f Y 'Figure 3 is an end ,vievvy partly in section of another construction of clamp alsoaccordi-ng `to'this invention, and

15 Figure viris a vie'W Ipartlyfin section taken .j at rightangles .to Figure 3.

j ,With reference 4first' to Figurel lfthe'pipes Vvor sheathsto'be'joined are indicated at A Y Y vand A1 and the sleevevrvvhich is to make ther `zo'jointrover their ends is shown at B. n

heating clamprCis in two parts clamped The round the sleeve Bl by nuts and bolts C1. The clamp has aprojecting member or fin (l2-and a vtubular extension C3 covered With asbestos 25 at D. 'Ihistubular extension forms a shield f to protect vthe adjacent portion of vthe pipe t A1' from the heat of abloW-lampflame ap- C2, and itis of sufficient in-` y pliedV tothe fin ternal diameter to leave Van air space be'- y *r3.0 tWeen'itfand thepipe A?. j Y j Theheat fromtheflame yapplied tothe fin n C2 is con'ducted-- tofthe'tclamp proper and through itto the sleeve B'Which is of readily Y fusible metal or linedthereWith. When the 375.7temp'erature is sufficiently high the joint is i heating membercomprises Vatubularst'emfC -l fvvhich 'may bemade offsome vmetal such as.

Y copper, being agoodfcondu'ctor of'fheat, 'and *Y isadaptedto be firmly held lahole in the Vclamp G6 by studs C7." Each of these stems C5 Yhas a head with radialinsv C5 enclosed in a kfunnel-like chamber Clined withas- There lare tvvo of these heat- YC?? Within the mouth or funnel C9.

v y By Way of illustration of one of its usesthis clamp is shown as being appledfto a @and VB1y y *y Whichis tozbewjointedfto the lead sheathing 95 Az'o'fa'cablelwhere liti-enters Yajunction box f' :spondingly shaped so that the necessary pres-vv sure maybe appliedfto the gland by tighteir. I0` Y stein fitting intosaid'hole, Iand aff-unnel-like formingpart of `saidheatingmember and other parts fsimilar to corresponding parts applied are iseparable'from th'e'zlampv` vEach A lname to this specification.

the Wall ofi-Which is indicated at The outo Y i side of this gland 'B1 istapered and the internal surfaces of the clamp C6 are correing up nuts F on bolts or studs F1 which are secured to the junction box; VThe pressure of. thexnuts F is Yexerted through ,ayoke/v plate lF2 and a tapered sleeve' G the inner end y'of which presses against the clamp C6.' A

, As shovvnthe internal'taper of this sleeve Grcorresponds With the external taper .of the'k gland B1 and thus, When the 'joint isffinished,

Vthe clamp may be removed and the sleeve y plate F2 and nuts Vand studsl F Flused to keep the `gland B1 pressed tightly against f the Wall of the junction box. r' By having .the heaters VC5 C? separate lfrom the clamv they can be usedinterch'angeably With electrically heated elements of'knovvn type 'having stems of dinfiension'sVV similar to those of the stems C5. l Y

What I claim as my invention and desire to secure by Letters'rPatent `is.:'-j Y l. In apparatus for use in jointing lead or like ,pipes `or sheaths, thecombination ofa clamp adapted to apply heat .and pressure to a sleeve round the joint andh'aving Va hole or recess, a metal heating member vvhaving a mouth orchamber round ,said member into 1 Which chambera flame can'be'directed` l l 2'. Inapparatus for use in j ointing lead or like pipes or sheathathe combination of aY clamp adapted, to apply heatandpressureto a sleeve round the joint and havinga holeV or recess,"a metal heating member, astemj :fitting into said hole, a head to's'aid member, j fins on said head, and a chamber round'sa'ld 51 the head.y

head into lwhich a flame canbe directed on tov` 3Iny apparatus for use in jointinglleaderl i likepipesv orsheaths, the combinationof a, r

clamp j adapted` to apply heat and pressure to l '7. g5

a sleeve round the joint and having a hole or recess, a metal heatingrmember, a Stem. forming part ofsaidheating member and.fittingf`- into said hole, a head to said member, fins on f said` head, afchamber round 'said head into whit-.ha flame can beldire'cted onto the head, and a lining of heat-resisting material fin said chamber. kv'- 'j In testimony whereof I have Ysigned VALFRED nneaefvvinsoiv.

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